For some laptop models, ubuntu installations show up by not hibernate in expected way. I have dug up in google about this issue and found some solutions.
this post.was the most relevant one thanks to the author,
make a script under /etc/pm/sleep.d/.
sudo gedit /etc/pm/sleep.d/20_custom-ehci_hcd
paste the following code into the file you have just created:
#!/bin/sh
#inspired by http://art.ubuntuforums.org/showpost.php?p=9744970&postcount=19
#...and www.ubutnusolved.blogspot.com
VERSION=1.1
DEV_LIST=/tmp/usb-dev-list
DRIVERS_DIR=/sys/bus/pci/drivers
DRIVERS="ehci xhci" # ehci_hcd, xhci_hcd
HEX="[[:xdigit:]]"
MAX_BIND_ATTEMPTS=2
BIND_WAIT=0.1
unbindDev() {
echo -n > $DEV_LIST 2>/dev/null
for driver in $DRIVERS; do
DDIR=$DRIVERS_DIR/${driver}_hcd
for dev in `ls $DDIR 2>/dev/null | egrep "^$HEX+:$HEX+:$HEX"`; do
echo -n "$dev" > $DDIR/unbind
echo "$driver $dev" >> $DEV_LIST
done
done
}
bindDev() {
if [ -s $DEV_LIST ]; then
while read driver dev; do
DDIR=$DRIVERS_DIR/${driver}_hcd
while [ $((MAX_BIND_ATTEMPTS)) -gt 0 ]; do
echo -n "$dev" > $DDIR/bind
if [ ! -L "$DDIR/$dev" ]; then
sleep $BIND_WAIT
else
break
fi
MAX_BIND_ATTEMPTS=$((MAX_BIND_ATTEMPTS-1))
done
done < $DEV_LIST
fi
rm $DEV_LIST 2>/dev/null
}
case "$1" in
hibernate|suspend) unbindDev;;
resume|thaw) bindDev;;
esac
save the file and exit back to terminal.
Give execution permission:
sudo chmod 755 /etc/pm/sleep.d/20_custom-ehci_hcdNow your system must work well with hibernate option.
